Oakwood, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.2 °F (low) to 62.2 °F (high). Annual precipitation averages 40.9 Inches. Oakwood is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.2 °F | 34.0 °F | 2.44 in. |
| February | 21.3 °F | 38.5 °F | 2.12 in. |
| March | 30.6 °F | 50.2 °F | 2.9 in. |
| April | 41.2 °F | 63.6 °F | 4.14 in. |
| May | 52.6 °F | 74.2 °F | 4.58 in. |
| June | 61.6 °F | 82.3 °F | 4.82 in. |
| July | 64.4 °F | 84.8 °F | 4.26 in. |
| August | 62.1 °F | 83.4 °F | 3.23 in. |
| September | 54.6 °F | 78.6 °F | 3.14 in. |
| October | 43.2 °F | 66.2 °F | 3.41 in. |
| November | 32.8 °F | 51.4 °F | 3.32 in. |
| December | 24.0 °F | 38.8 °F | 2.49 in. |
| Annual | 42.2 °F | 62.2 °F | 40.85 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |